My name is ***** ***** I will try to assist you. Do you have any codes on the dash display? Do you have a code reader to pull up the ABS codes on the vehicle to determine the code in the system? The brakes not releasing, usually has nothing to do with the ABS, unless the module has the brakes engaged, which can be prevented by removing the ABS fuse. Otherwise, that is a different situation all together. Please tell me what is going on with that? Were all the chambers checked when the yellow know is pushed in to see if the chambers are not leaking? Have the slack adjusters been checked to make sure they are working properly? __________________________________________________________________________________________________________________________You want a 5 star service and I want to provide a 5 star service. Please consider that I don't know your skill level as well as I can't see,touch, smell, hear, or taste the vehicle/machine in question. Please provide as much detail as possible and I will provide as much back.The system DOES NOT automatically give me credit from your deposit. A rating is REQUIRED. You are rating me for the information I provide,not the website. I have no control over the site fees, site errors, category errors, or how long it took for a response for these reasons.I am not an employee of this website, so please rate with a POSITIVE (green) rating for me to get credit for assisting you. You still paythe website for negatives or by not rating at all. I just get nothing from that payment you made. So please rate each answer I provide.I want you pleased with my service to you so please inform me before rating negative (red) and I will do my best to make it right. Followups for same question are always free after ratings have been made.I do have many workshop manuals, diagrams, etc that I pay to get access to out of my pocket. If one is needed, please ask and I will giveyou an offer at my technician discounted cost to you for such manuals. I never charge above that cost.Thank you for allowing me to assist you through Just Answer!Jeremy